Xu, Shunshan, et al. “Structural Analysis of a Relay Ramp in the Querétaro Graben, Central Mexico: Implications for Relay Ramp Development”. Revista Mexicana De Ciencias Geológicas, vol. 28, no. 2, Feb. 2014, https://rmcg.unam.mx/index.php/rmcg/article/view/204.